From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD292C2D0CD for ; Thu, 15 May 2025 18:53:47 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 23B836B00A3; Thu, 15 May 2025 14:53:46 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 1E7156B00A8; Thu, 15 May 2025 14:53:46 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 063546B00A9; Thu, 15 May 2025 14:53:46 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id D82266B00A3 for ; Thu, 15 May 2025 14:53:45 -0400 (EDT) Received: from smtpin28.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 78FBBB9DD3 for ; Thu, 15 May 2025 18:53:46 +0000 (UTC) X-FDA: 83446041252.28.60C4C27 Received: from NAM12-DM6-obe.outbound.protection.outlook.com (mail-dm6nam12on2045.outbound.protection.outlook.com [40.107.243.45]) by imf24.hostedemail.com (Postfix) with ESMTP id B0CD918000E for ; Thu, 15 May 2025 18:53:43 +0000 (UTC) Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=Nvidia.com header.s=selector2 header.b=Td0E4XqW; spf=pass (imf24.hostedemail.com: domain of ziy@nvidia.com designates 40.107.243.45 as permitted sender) smtp.mailfrom=ziy@nvidia.com; arc=pass ("microsoft.com:s=arcselector10001:i=1"); dmarc=pass (policy=reject) header.from=nvidia.com ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1747335223; a=rsa-sha256; cv=pass; b=5OmxUoks9H4dkVXMrmxCr65fhSYqf1LxxPNXoQendLqGzXK4ivU3eWZc/w9yG63pTgREq5 5qS14LVOT07uPKSqJL7vw5tMYOCJM47epkdQa8Vwh2OZIGhzDV6RPzIAMyHpKjalNgn2mZ 6S6YgqD7+vikUj4MCW/G839KFE2RLKs= ARC-Authentication-Results: i=2; imf24.hostedemail.com; dkim=pass header.d=Nvidia.com header.s=selector2 header.b=Td0E4XqW; spf=pass (imf24.hostedemail.com: domain of ziy@nvidia.com designates 40.107.243.45 as permitted sender) smtp.mailfrom=ziy@nvidia.com; arc=pass ("microsoft.com:s=arcselector10001:i=1"); dmarc=pass (policy=reject) header.from=nvidia.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1747335223; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=nKHyUeGjspUktJy9RdGym42gPQbKROSK9DASBhgepnY=; b=VDNxOniB6dxMSuj4fypnw276XAaEHM2GR3jqvujvWTDqcEz6sYAnntGb1U4wH5HeKXBa1R x2/HFjOILPRapwWuzO6jZUIbGOJYzsj++iO+c13EL4xnUDLIedVXeWvi3JeniQ5uudvfpc 7hLn5gyKrtrtvlvo0qhJd/tzTRGU0CA= ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=oAGRqCI/BPI435pOegaLTsFds9YafWA4WDpd4o7HUzaOn1rvuAxy/2+PnQhcsrqGOcsdW61OGivmSjNNLXbuwB9t9IRm+M+gNIgDFqy4C/lBVN9CKuwgPJb8Dka8Li5vFYWUQhqCoL0ZzDwUAroR0mNKYiYtRdtkkOSHKXV6tndNw506FITJWZ0cqjhS2MubAk6Apt/7EYL/mQttDJtsNiheD4t2n477j8FrW4vG+sry138H0+JbH7HVqJ2EDDzfz2H3hn9to3Rf05GUhzkvp7e5TPJBBoGCPYUXAtr7o7Eiy/8HA3ERgmIMXc21h2sFY0pH7mDyOb5+7whKf272YA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=nKHyUeGjspUktJy9RdGym42gPQbKROSK9DASBhgepnY=; b=U/lj37eWbc5oyKG4JCOqiDHARfBuYR1P91EGU2V38SUaMazhICInj/ZoLdOkDOdLKd//oQol3IThR3vnuhclVam1V8gg54ZDtQElHL/e5xHHf15uhunvJF3KeUA5oUBvWJbjjDB7gF7Od3XdC/CInPwKdyUr5DIECaNyBH7tV/+sI5VQeCvC5MTYKXN7GJ+w68PfAlIsqyDkPw+/YNqHxk4id+T5yY1QtqaHCaBMHoD99i+4Nn5JYQUUPmHnEAvHuzgrmsvd+a8+HZHi6Aj1k4eoIGnWcZAKIKAEyPkIb7bFKYOmKInnEu1xxr5ahsX/U9OPPQ5yHtn1Xj9e/lN2pw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=nKHyUeGjspUktJy9RdGym42gPQbKROSK9DASBhgepnY=; b=Td0E4XqWaAhxkGk51zFXo/UyerO0zXJ3dmbjKo2iCHGP2aiuAewKoxsNbwe1u5SH5MZx/FKyBs/0HPV6Hk5dkFEhAGYnmJUPsDDW374/+Y7IeVIYFbvATadO54oXKnrVc+svqeXTbtRJ2n5q7RMxfKWiwiEIfj5UHt3V+Pph0qf3op1+fod+eOpVm125OD0ZS0yOQV81MIUSIaNd8mLxlOQcokZD1440U9NkSNdSiLHjkJWdKBImJ87yFHOmQ7EVLZSuTTrOb+Wn983tl976q2w6aAd+OEK7rNsqTD3VTJu13l0iYFkKH/gOjfOI2ffrKp847tY0OwuBZeauV2lb4A== Received: from DS7PR12MB9473.namprd12.prod.outlook.com (2603:10b6:8:252::5) by CH3PR12MB7547.namprd12.prod.outlook.com (2603:10b6:610:147::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8722.31; Thu, 15 May 2025 18:53:38 +0000 Received: from DS7PR12MB9473.namprd12.prod.outlook.com ([fe80::5189:ecec:d84a:133a]) by DS7PR12MB9473.namprd12.prod.outlook.com ([fe80::5189:ecec:d84a:133a%5]) with mapi id 15.20.8722.027; Thu, 15 May 2025 18:53:38 +0000 From: Zi Yan To: Lorenzo Stoakes Cc: Pedro Falcato , Adam Sindelar , linux-mm@kvack.org, Andrew Morton , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] selftests/mm: skip uffd tests in madv_guard if uffd is not present. Date: Thu, 15 May 2025 14:53:36 -0400 X-Mailer: MailMate (2.0r6255) Message-ID: <05A8161C-ABF0-49D4-BEA0-8746C78570D6@nvidia.com> In-Reply-To: <21c39cf1-6c8f-44a3-8bea-b0c8e6eac2c1@lucifer.local> References: <20250515182333.346587-1-ziy@nvidia.com> <6601AD88-C2B7-47DA-B75C-46AFEE1BD2AC@nvidia.com> <21c39cf1-6c8f-44a3-8bea-b0c8e6eac2c1@lucifer.local> Content-Type: text/plain Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: BLAPR03CA0046.namprd03.prod.outlook.com (2603:10b6:208:32d::21) To DS7PR12MB9473.namprd12.prod.outlook.com (2603:10b6:8:252::5) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS7PR12MB9473:EE_|CH3PR12MB7547:EE_ X-MS-Office365-Filtering-Correlation-Id: 3b7d5e34-be96-4d4b-da14-08dd93e1cd86 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?0YPLnpNrmpsE+E9693LhUypapOBurMJ/RHkTj3y/L5GWZT8l8mi/Erl1PL40?= =?us-ascii?Q?z34X4Im9cXWZhHqtU394Cf9sSUeuywUAQZn1wWdJZjI4RhUTrgrwpJDGczYf?= =?us-ascii?Q?ME2PZl1DUIiXMQ8MfYXcImOXBGk8n+ytlsFstMuoBDjPdmUeS/Bj20e8ptYj?= =?us-ascii?Q?2jn+0mTC4y0bgSZ4rY4/YxlWuInjHxX9Xq84TkAOX4HnzVTrRQ3RMezhOWCc?= =?us-ascii?Q?a4xWMpjbR6dVPgSyq7Bp6JYExSVVyi+/YYvtrGFhwpeiEjwGNg1+ffmkotTT?= =?us-ascii?Q?YB1O+t7abQR7rNtdXxiiA1xaHeHnTutS247npuaXWbodXoKnkHJrJr+odMXj?= =?us-ascii?Q?eDoXjy74U/oXOuQ8mPpVYRTxIbN4coaAov70dtkn/g32zFkRKFwe4yKGbtVp?= =?us-ascii?Q?SzGS+cJTrgwYk+Nv8XQ6vZOH5OyStH+Qz8eY9r/DMJdUZq5NLQZsExtIB1RR?= =?us-ascii?Q?N5AUxEoj+HWL5kQAhzfp3bjAhptK4XSGZHIal2hxAlbTnAe1fQAJ3/wklXNX?= =?us-ascii?Q?GZiWGkR34y3K/vlXT7yN/G71D8RNXXzPweAALb87TTBx7DV8jWj8b17urRUG?= =?us-ascii?Q?zYE+OyJHIh8cIl28YzG791jjQ8GaHGhzXq2mq7rLJm5KH+WMr9osAQIBhyX2?= =?us-ascii?Q?x3tzNsgNm6aV2PjtfPQiWKpKJJiU+rKbTaHMF3u5fQJYdaBH02FhwMcWOwLC?= =?us-ascii?Q?WfrvyItfQ6iWpyUckIiJ/eJbZR15wbAzlQoOnbRecrCmqYYs4gHXbsQxKwdq?= =?us-ascii?Q?lDbk1wUg+ZdwEQVo3UoPy9KFTDSUvCae5LysIRQUFzPMaVqSRK75/vgrWGXj?= =?us-ascii?Q?4JBNG5/zatKxfjpd1zCDYU6/wYySOPqJdi9EtaUnXRXtbW8FOSIrsY1uHCLz?= =?us-ascii?Q?Be6RdPyzkMICePRiEnod56Mt+LNZ4LPF0MGE4bD5wRbxFxF0lxrxlh9etwox?= =?us-ascii?Q?FS/sc1NJZxU1/UD0QOFaeXK8Xr31l/n2Y4ObbFogfDOGk+74fdIPIlX7hMyF?= =?us-ascii?Q?CxFCCnlXDVQ4/thWt+S7Bu/zS4dXn+bFjcZgS/+lKgOtywBxAq8ENA/idEKX?= =?us-ascii?Q?RhecaujoJ+ZB76TxKcTmlb+jNKrfZincYhm8fG1a+WRzOTTBWGKKiSLhCuXv?= =?us-ascii?Q?Nk+Wq2OsK6aMXARMN7joI3AheMB0XSr8/lz2HqZR+nUO1DHQmSy63WNbQgZZ?= =?us-ascii?Q?6AdueTnc76mGpBInl/BRmuA4+LNZgXHtA4D3CxN+YVc2Pnimaz1y67aJOUBx?= =?us-ascii?Q?d6qn8Zd84nFoyj0Zw7rLkeQPxg4fPumy9KnM+KsV1PuHIR4cCRc+iUnLEqy3?= =?us-ascii?Q?IdZcWhaRbYqTwbwMabLjmXldSj7NcnvpNRYL64uoiqQohH5APqgTHdV6yNfF?= =?us-ascii?Q?Dlq/41ZItQTdHVBXhhFE7TpzzCO3fBxvQUEAeu8qVtggcY8wmkeNipJbmYCS?= =?us-ascii?Q?+cW+l2qtoUQ=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DS7PR12MB9473.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(376014)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?J/9AN5536aj8XgXQtfUHpCZVfg6dnyKD6Z0T7ToRr6lsDBci80RH5BttDyE2?= =?us-ascii?Q?ZjUWptIXoI56NVn6oP9X4Ss1H3NON4V+hnUstOLa8PLjR6jd8JtHm/pFMtwJ?= =?us-ascii?Q?PijdzdoF3Y/7aPPQZOIwLFWefrbZ/YmoCyi6KMpHe87sLG2bflsGPBcs+woB?= =?us-ascii?Q?J2z0d9n1SuYBf7lLuAx4XD6XGpS9xpcCnUiYBb9j3SxBcM5dNTD9nGpis6Qy?= =?us-ascii?Q?DohS3G1NdQd1uab6lIy2ZVUcKyZywWh12xzeYjdUS6Druv2V2Y0zBAu8Z1xi?= =?us-ascii?Q?YngbhOnBQDBNeXQyfto6pXVquF7S6VS6yAaE/WJlZwI+LeZtPFMaT3x9ecaE?= =?us-ascii?Q?Yk1OWzn6D//L1P68AmdYvKuuxgeTgsQuLbIDl0VmBqAM0PtEq6j5rSUb0+98?= =?us-ascii?Q?QHYaYGEoWxkp6i7I3oY2ylQuY7E2f95erx76xarAxIO7d0PABk8R0rarbgmr?= =?us-ascii?Q?/llhBv0q1nt/dtxDRMHsPklbIB5/EC6oqfK6p5Z3RqY3LduLwKj40nCYpA9v?= =?us-ascii?Q?l3w+Suj1V3AhRRJ53MXl4HgCPaCuEbp/s9pV5Tom7vgPATM9EfYMMChHmwgv?= =?us-ascii?Q?6E1izERxR8LUGuo4kqRkf49H6PjQxawtVHLkqWmDgr2unO+CH2xQTyTUzttz?= =?us-ascii?Q?3C60ibLthjwii/qoBkw1WFSpQvAzbruajzFD4Gt2mU11QzGOQgps4EVgL3Nn?= =?us-ascii?Q?nmroNZfs1RJHZkhQzh0TZaSSwwIjriEYM3wj65JjNPWVOvz+Ir8J+iCypGsO?= =?us-ascii?Q?Mvf09mPYcSY4GMF5JpWsKVZt6omZmm9rdB+53ED58yeqGyiJ+CILHuXMqZpl?= =?us-ascii?Q?0TRQb+/mJ08n1tAb+8ReLhDi/D1jN+gxP6rR+keK5lQuGY0G4sgAXVKpC/7x?= =?us-ascii?Q?DdwyjAjimQCQyYCWjLnaT+WNr1RBe8VLJ7kI2KIt5mXIekwTRnva72NB3wC6?= =?us-ascii?Q?LHU3GT7okiv2KaPtia7oZJsM3Wa9MiDtdjwQ0mwyyf+AMqSX91PnfEVYH/8A?= =?us-ascii?Q?I7PZkLzzK7XvSYnmlaoWdW0/WsCbQFmE5Scp40P04HUdPLmq3P1eNxuTWXrg?= =?us-ascii?Q?gOb7ypFd9EGHXPyB1f8wnbrUHRa8ZgcECNlt0gcH0e6kU9nNtdPTTWeeqvj1?= =?us-ascii?Q?XZfa/nhfFH6+QE7avmtEMxpVRvI+CehG9V51vVpka1LDxzn5EnU5DnsM3zmL?= =?us-ascii?Q?HEYgyBhX8kjWyugAT+BIktu57QeRmnxkoIfSKT8NLWFBydGaxf9MLDyRH1xL?= =?us-ascii?Q?csXXNadxh2/DTMmdnCTbwxYIVkwaOMv/PicRpjiZq4PYE6qtJry6kHRoQiHV?= =?us-ascii?Q?AmS0FgQJlxG5AlVtNZ/TBfXTYvQlZXoP2VI34Tt7hRE+QGg2NuxVBKOu7RWo?= =?us-ascii?Q?qb3PYb2epJe3U/cfR5HuSR57m+lsZknxvgKwiBlqSDrwxFp75KpGdWz9hFcc?= =?us-ascii?Q?jb+0nVBy/0Kx3qe5AJZWAlZ1ODn7ZUP0xj4nxrcr7GzoHTg8Tz4orixtmJJi?= =?us-ascii?Q?lsvJIJ2nm7fLyhutAGHSnOnPIwAoWl2f6mcBvCw4IjejaSYLTc017lC16ns+?= =?us-ascii?Q?tyJco2AoPolqAZ9nlluipaWLexu6nstN0mopKpkJ?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3b7d5e34-be96-4d4b-da14-08dd93e1cd86 X-MS-Exchange-CrossTenant-AuthSource: DS7PR12MB9473.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 May 2025 18:53:38.2666 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 7nLBulYnkyIFgtQHDnm/Qb1pQxGQk6MXfakWDMP897VwUx6MpM3xQowQJLFNRGdB X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB7547 X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: B0CD918000E X-Stat-Signature: iqi5rczqjkcpx3sedbjn3ah6fbhyj8yh X-HE-Tag: 1747335223-225629 X-HE-Meta: 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 QdWNN2cv e6c7DTqz/K8fTImW6gbn/+zNHQmiE1w/a42r6K88aba41+esGz8ZUvXLW0gA+P1Ru3ZJHbA0Z0yUKxAi56VqXogdW7sg9zi8gpaHTJcI+fNg1Iry7Yn98rzJ39dJDb0Fv7fzVRMb7qvcNTaaMXmsqC7DHwjKOO2E5vbaFrNddG/ywRzbe95DuIGIaBwA4Y6CxJqEtMtbnKqRvw5BA59hLSMxeZCwSrYtzy8XbCdCVR98PibfexKWtJi6VV7yLwQIle7df/Z+ulbKVELgLyHMKZHSebg4vgEV/C1678JJl5BqrPwFDbiqNFgyYIYzhc7HgrxsU3VbYMInszBq2qB6yMAaPK7NPu7az2hbBhxStm0OpAq0GG0b0mbM2mNSZ3TZO1Wqh42UeXYH6m9vUZmzaqP7GmjN5c5gteMl4Os9uVAZV1ZO0IV3zgDTbfxXGPOF6aT2riRkme5Jlqew= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 15 May 2025, at 14:49, Lorenzo Stoakes wrote: > On Thu, May 15, 2025 at 02:46:41PM -0400, Zi Yan wrote: >> On 15 May 2025, at 14:41, Lorenzo Stoakes wrote: >> >>> Ah you got to this first :) thanks! >>> >>> Could you do this with a cover letter though? It's really weird to ha= ve 2/2 >>> reply to 1/2, I know sometimes people do that, but it's just odd, and= it'd be >>> good to have an overview, thanks! >>> >>> On Thu, May 15, 2025 at 02:23:32PM -0400, Zi Yan wrote: >>>> When userfaultfd is not compiled into kernel, userfaultfd() returns = -1, >>>> causing uffd tests in madv_guard fail. Skip the tests instead. >>> >>> 'madv_guard'? I'd just say the guard_regions.uffd test to fail. >> >> Sure. Will change it. >>> >>>> >>>> Signed-off-by: Zi Yan > > Given I was being an idiot below, now the patch is fine as-is, just res= end > with the nitty commit message change and cover letter as a v2 and we sh= ould > be good :) Sure. I am also waiting for Adam's feedback on patch2 and will resend lat= er. > > Reviewed-by: Lorenzo Stoakes > >>>> --- >>>> tools/testing/selftests/mm/guard-regions.c | 17 +++++++++++++++-- >>>> 1 file changed, 15 insertions(+), 2 deletions(-) >>>> >>>> diff --git a/tools/testing/selftests/mm/guard-regions.c b/tools/test= ing/selftests/mm/guard-regions.c >>>> index 0cd9d236649d..93af3d3760f9 100644 >>>> --- a/tools/testing/selftests/mm/guard-regions.c >>>> +++ b/tools/testing/selftests/mm/guard-regions.c >>>> @@ -1453,8 +1453,21 @@ TEST_F(guard_regions, uffd) >>>> >>>> /* Set up uffd. */ >>>> uffd =3D userfaultfd(0); >>>> - if (uffd =3D=3D -1 && errno =3D=3D EPERM) >>>> - ksft_exit_skip("No userfaultfd permissions, try running as root.\= n"); >>> >>> Let's just make this all part of the same switch please! >> >> What do you mean? EPERM is handled in the switch-case below. > > Oh man, I'm the biggest idiot on Earth haha! > > For some reason I read these '-'s as '+'s :)))) > > Yes please ignore the above, I therefore - like your approach - and am = good > with it. > Yeah, I kinda figured when I read your message, but wanted to double chec= k with you. >> >>> >>> And while I originally used ksft_exit_skip(), I think we can just use= the >>> SKIP(return, ...) form here just fine to keep it consistent. >> >> Right. I am using SKIP below, since when I ran it, ksft_exit_skip() >> makes the whole test message inconsistent. > > Yes, your confusion is warranted, I apparently can't read... :>) and > indeed, agreed. > > Thanks for doing this! > Thank you for the review. :) >> >>> >>>> + if (uffd =3D=3D -1) { >>>> + switch (errno) { >>>> + case EPERM: >>>> + SKIP(return, "No userfaultfd permissions, try running as root.")= ; >>>> + break; >>>> + case ENOSYS: >>>> + SKIP(return, "userfaultfd is not supported/not enabled."); >>>> + break; >>>> + default: >>>> + ksft_exit_fail_msg("userfaultfd failed with %s\n", >>>> + strerror(errno)); >>>> + break; >>>> + } >>>> + } >>>> + >>>> ASSERT_NE(uffd, -1); >>>> >>>> ASSERT_EQ(ioctl(uffd, UFFDIO_API, &api), 0); >>>> -- >>>> 2.47.2 >>>> >>> >>> Thanks! >> >> >> -- >> Best Regards, >> Yan, Zi -- Best Regards, Yan, Zi